Young's 'Night Thoughts'
Night VIII, page 23
The British Museum
The quote from Young which Blake was illustrating:
'When, through Death's Straits Earth's subtil Serpents creep,
Which wiggle into Wealth, or climb Renown,
As crooked Satan the Forbidden Tree,
They leave their party-coloured Robe behind,'
Four Zoas, Night VIII, PAGE 107 , (E 380)
"And this is the manner in which Satan became the Tempter
There is a State namd Satan learn distinct to know O Rahab
The Difference between States & Individuals of those States
The State namd Satan never can be redeemd in all Eternity
But when Luvah in Orc became a Serpent he des[c]ended into
That State calld Satan"